Multi-Account Strategy :

Multi-VPC Network Infrastructure : https://docs.aws.amazon.com/whitepapers/latest/building-scalable-secure-multi-vpc-network-infrastru…
AWS Organisations : https://docs.aws.amazon.com/organizations/latest/userguide/orgs_best-practices.html
Single Sign-On : https://camlingroup.awsapps.com/start

Management and Governance : https://aws.amazon.com/products/management-and-governance/
Cost Management : https://aws.amazon.com/aws-cost-management/
Security Identity & Compliance : https://aws.amazon.com/products/security/
Storage : https://aws.amazon.com/products/storage/

Transit Gateway with Multi Accounts using Shared VPC

Transit Gateway vs Private Link vs Peering

 

Tags